438 



THE ORIGIN OF THE LIBYAN HORSE 



[CH. 



ment by means of shadow contraction was required and was 

 gradually perfected by the toning down of the stripes on the 

 upper side and the suppression of those on the hind-quarters 

 and legs^" Mr Pocock thinks that the ruddiness of Cape 



Firt. 131. The Elgin Quagga. 



m 



Colony quaggas was acquired by two different processes- 

 the case of Daniell's quagga by a deepening of the red of the 

 ground colour or interspaces and the reduction in the length 



^ Ann. Mag. Natural History, 1904, p. 328. 



I 



